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Altera_Forum
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15 years ago

PLL's error on ARRIA II GX

I am currently using ARRIA II GX device on the SDI project. The device has 4 avilable PLL's to use. I ran into comlilation error which indicates somewhat like I don't have enough PLL ??? despite...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

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Seems that all depends on other factor.

1)Error: Can't place PLL "test_pll:inst9|altpll:altpll_component|test_pll_altpll:auto_generated|pll1" in target device due to device constraints

It should be if you've try to set the PLL in a location that is not compatible, or if your CLOCK INPUT PIN is phisically attached not to the PLL you've set to use.

Good luck

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Hi Darkwave,

From Pin Planner, I know which pins are connected to PLL, for example, PIN_AA) PLL_CLKOUT1n, as I am trying to set DDR2, I didn't place PLL manually. So, based on what you said, cause# 1 is out of question since it is automatically placed, therefore, cause# 2, my ref_clk wich is constrained by my .sdc to be 100MHz.

How do I know where my PLL is? and how to connect them?